here are the actual fan info from someone who has a Dual 1.25 MDDPapst 4212H 120x120x38mm - 3400rpm / 108CFM @ 49dBAcbel power supply fans (x2) Minebea 2410ML-04W-B60 60x60x25mm - 5300rpm / 25CFM @ 38dBI have read that Apple has also used Delta AFB0612EH - 6800rpm / 38 CFM @ 47 dBA. I think these were used in the very first MDD's that everyone complained about and Apple subsequently started the power supply exchange program that offered both AcBel (newer version - possibly like the one in my 2003 MDD) and Samsung power supplies.Optical drive fan is a Delta AFB0612HHB 60x60x15 - 4500rpm / 17.3CFM @ 35dB

By the way, here's what I'm looking at for getting two fans hooked up for each of the ATA66 power connections:http://svcompucycle.stores.yahoo.net/du3to4ad.htmlIt's a 4-pin to split 3-pin cable. I don't know the length, so I might buy some kind of extension just in case I want to throw some fans in the bottom of the front of the case.

I'lll also be getting a BFG GeForce 6600GT soon (to flash, etc). While I'm not worried about its cooling at the moment, I am concerned about connecting it. Most of these newer cards need an extra power connection. Is it 3-pin or 4-pin? I have a free lead from the second optical drive bay. Would it be safe to split that one to throw an etxra fan up where the speaker is (ie, I will be removing the speaker and mounting it into the top of the case)? If so, I'll need one more 4-pin to split 3-pin power cable.

Do all DDR RAM heat spreaders fit the same? (Speaking of RAM, the 6600GT better not encroach on my RAM slots or I'll need to buy RAM again!!!)

Now on to fans (still from http://www.svc.com):1. Main fan:http://svcompucycle.stores.yahoo.net/kd1212pmb1-86.html - Not too loud but not too weak. I could alternatively go for something in the 38dB range that pushes a little less air. A couple of the Panaflo ones mention that they should be plugged directly into the PSU rather than through a 3-pin connector on the mobo. Hmm. Guess I don't want to use those!

3. Optical Drive Fan:http://svcompucycle.stores.yahoo.net/fba06t12l.htmlI may remove my second hard drive (I really wish my main one had a temp sensor, and I should've thought about that before I bought it) and add some kind of hard drive cooling unit to my main HDD, so I figure with less heat in that area of the case, the weaker fan by the optical drive might not be so bad.

I can't find Verax fans in the US but I hear lots of good things about them. Oh, well! Even a slight reduction in noise at this point will make me very happy. I also have a copper heatsink (if it doesn't actually fit onto a FW400 MDD, I'm going to cry) to replace my current aluminum heatsink with. Maybe after all this my CPU temperature will drop below 55°C!!!

OK. Well, I better stop now. My big post habits can get out of control!

IDE drives all use ribbon cables for data and 4 pin Molex connectors for power. The Molex cables are hardwired into your PSU, but you ought to be OK to replace the data cables with rounded ones. There was at least one of the PowerMacs which did have something slightly odd about its data cables. I think there was a deliberate hole in one line somewhere. Most however are fine with any old Master/Slave or Master only cable. My MDD has at least one ATA cable which came from elswhere. Probably a PC.

May I suggest you read my mod guides on the mdd G4. Overtime I replaced all of the fans and then the case and at this time it is as cool as it can get. Yes, it is cooler than h20! I had a system on it and it proved to be no cooler and it was noisier too. May I suggest Panaflos in the Low range. I used Sunons for my psu. Good luck.

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